Since I haven't yet read/seen any posts about success stories on the subj (except for someone who claimed he added a usb bt dongle, but didn't support it by any tech info/pics), I'm getting ready to perform a first surgery on my C1K. Time permitting, I hope to do it sometime next week (maybe on July 4th holiday weekend).

Here's a few thoughts I have on the subj:- There's a ffuart wired up to a port on the back of the C1K (so-called sharp i/o port) that has all modem control lines. I'm leaving it as a last resort (if everything else fails), since I want to retain it for rs232 comm.- There's a btuart in PXA270 that has CTS/RTS control lines, but it's unknown if Sharp traced it on PCB. I would guess that it would make sense to have it traced just in case, i.e. planning for future models with built-in BT, but with Sharp you never know...- Well, it leaves us with stuart that is wired up to IRDA transmitter/diode, but doesn't have any control lines, so hardware flow control is not possible.

If btuart lines can't be traced, either rs232 or irda has to go. Personally, I don't use IRDA myself, so for me the choice is clear. But not having hardware flow control leaves us with a challange of fighting high interrupt latency of bloated Sharp's kernel to avoid fifo overruns. I took a look at Sharp's serial driver, and as usual with sharp it's ... well, not good. I had troubles with overruns even at modest speeds. Now, the good thing is that it;s Intel PXA270, not Sharp's proprientary hardware, so full tech specs are available. I spend a few hours on "unsharp'ing" the serial driver, so now it seems to run ok. I tested it @ 460800 and not getting overruns anymore. I still need to test it @ 921600 and implement suspend/resume hooks, maybe add some hooks to front LED to show activity, etc.

Anyway, just thought it would be useful to have a dedicated thread where we all can share tech info and success stories. Please feel free to contribute... and I'll update you on status of my surgery.-albertr

I've contacted with an official Dell distributor in Russia and they will tell me about availability of this module tomorrow.

While you are waiting answer from Dell can you tell me it is possible to use LED wires for control bluetooth power? I think, it is one of abilities. For example, we can use mail LED as Bluetooth LED and bluetooth power control.

I've contacted with an official Dell distributor in Russia and they will tell me about availability of this module tomorrow.

While you are waiting answer from Dell can you tell me it is possible to use LED wires for control bluetooth power? I think, it is one of abilities. For example, we can use mail LED as Bluetooth LED and bluetooth power control.

Yes we can. But what if you want to leave this LED for mail notification?

I've contacted with an official Dell distributor in Russia and they will tell me about availability of this module tomorrow.

While you are waiting answer from Dell can you tell me it is possible to use LED wires for control bluetooth power? I think, it is one of abilities. For example, we can use mail LED as Bluetooth LED and bluetooth power control.

Yes we can. But what if you want to leave this LED for mail notification?

I just want to foget it By the way, we can try to combine LEDs and power control. How is LED control constructed? Perhaps, we can use somthing like one-wire control? I'm trying to find one-wire switcher or trigger to combine some functions.

By the way, we can try to combine LEDs and power control. How is LED control constructed? Perhaps, we can use somthing like one-wire control? I'm trying to find one-wire switcher or trigger to combine some functions.

Sudden inspirational thought:

Why not just control the bluetooth module with the charging LED without fancy switching?!

1) if Z is being charged, the BT module is turned on. But since you're on charge, you don't care about the extra current drain! Unless of course you're using an external battery pack/charger which very few people do.

2) if the Z isn't plugged into a charger, then you know the BT module is on when LED is on, as it wouldn't be on otherwise.

Why not just control the bluetooth module with the charging LED without fancy switching?!

1) if Z is being charged, the BT module is turned on. But since you're on charge, you don't care about the extra current drain! Unless of course you're using an external battery pack/charger which very few people do.

2) if the Z isn't plugged into a charger, then you know the BT module is on when LED is on, as it wouldn't be on otherwise.

Am I going mad or is this a good idea?

What if you use bt to open an rfcomm connection to your phone to get online while on the road?-albertr